CVE-2022-49137 drm/amd/amdgpu/amdgpu_cs: fix refcount leak of a dma_fence obj

In the Linux kernel, the following vulnerability has been resolved: drm/amd/amdgpu/amdgpucs: fix refcount leak of a dmafence obj This issue takes place in an error path in amdgpucsfencetohandleioctl. When info-in.what falls into default case, the function simply returns -EINVAL, forgetting to...

CVE-2022-49137

CVE-2022-49137 concerns a refcount leak in the Linux kernel’s amdgpu_cs_fence_to_handle_ioctl() path. When info->in.what hits the default case, the function returns -EINVAL without decrementing the previously bumped dma_fence refcount, causing leaks. The issue arises from a missing refcount de...